Hi All,

We are thinking of installing a rainwater collection system and we were wondering how much of a storage capacity we will need. We live in Greensboro, NC. I can get the annual rainfall data and measure the square footage of the roof, and when it rains, it pours here so I imagine a pretty large container would fill up on a rainy week. But then the question is: How much water will we need to water the garden? And, how long is there between the rainfalls that would refill the tank? Ideally, we would want to have a large enough tank that would be nearly depleted by the time new rainfall arrives. I browsed around the Internet, but I did not find an easy way to calculate this. Any advice?

Thanks!

hren, you might want to go back to page 3. There is a thread about this there.

Thank you, my bad - I checked the Internets, but naturally forgot to check the posts here. I would delete my post, but I don't know how. Sorry.

Posted By hren on 05 Jul 2012 04:01 PM
Hi All,

We are thinking of installing a rainwater collection system and we were wondering how much of a storage capacity we will need. We live in Greensboro, NC. I can get the annual rainfall data and measure the square footage of the roof, and when it rains, it pours here so I imagine a pretty large container would fill up on a rainy week. But then the question is: How much water will we need to water the garden? And, how long is there between the rainfalls that would refill the tank? Ideally, we would want to have a large enough tank that would be nearly depleted by the time new rainfall arrives. I browsed around the Internet, but I did not find an easy way to calculate this. Any advice?

Thanks!

hren:  Maybe this helps you?  Choosing the size of your tank

--Clark

It does - thank you!